actually mate, u need a special fluid, its called "matic D" its only available from nissan genuine only, unsure of the price tho, i need some myself for my 32 gts4, you also need it to top up the resovior in the boot on the drivers side too mate.....as far as i know, its got a special blend (unsure what it is) that stops the fluid from bubbling....from what ive been told, i hope that helps..
later